Nonlocalized modulation of periodic reaction diffusion waves: nonlinear stability
Résumé
Extending results of Johnson and Zumbrun showing stability under localized (L1 ) perturbations, we show that spectral stability implies nonlinear modulational stability of periodic traveling-wave solutions of reaction diffusion systems under small perturbations consisting of a nonlocalized modulation plus a localized perturbation. The main new ingredient is a detailed analysis of linear behavior under modulational data u_x(x)h0 (x), where u is the background profile and h0 is the initial modulation.
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